CHEMISTRY HIGH SCHOOL

State the characteristics of transition metals​

Answers

Answer 1
Answer:

Answer:

Conductivity, Malleability, High Melting Point, Luster

Explanation:

Transition metals have the following properties:

Conductivity (Electrical and Thermal)

Malleability (You can hit it with a hammer to mold it)

High melting point

Luster (Shininess)

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Which radioisotope has the fastest rate ofdecay?
(1) 14C
(2) 37Ca
(3) 53Fe
(4) 42K

Answers

The correct answer is 2. 37Ca.

The fastest rate of decay in radioisotope is 37Ca. Another name for radioisotope is radioactive of isotopes which are of given element.

The different number of neurons and the same number of protons are present on the same element with different isotopes. Radioisotopes are considered to have an unstable combination of neutrons and protons.
The correct answer to this question is (2) 37Ca . The radioisotope that has the fastest rate of decay is 37Ca. Radioisotope or also known as radioactive isotopes of a given element. Same number of protons but different number of neurons are present on different isotopes of the same element. They are considered as atoms that have unstable protons and neutrons combination.

List the different types of fuel that are made from crude oil

Answers

well there are quite a few so ima going to give you like four Finished motor gasoline,Distillate fuel,Kerosene-type jet fuel3, and coke 

How does a Geiger counter measure radiation levels

Answers

The Geiger counter measure radiation through the means of detecting alpha particles, beta particles and gamma rays. It uses an ionization effect produced by the Geiger-Muller tube as well. This is the most prominent tool used for radiation measurement.

Answer:

D- Radiation knocks electrons out of gas atoms, which allows the gas to conduct an electric current.

Explanation:

Edge 2021

What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.227 M in sodium chloride and 0.078 M in magnesium sulfate? Assume complete dissociation for electrolytes.

Answers

What we need to know is the molarity of all the particles of NaCl taking into account that NaCl = Na+ + Cl- and the ones of taking into account that MgSO4=Mg+2 + SO4-2. we are going to use a formula to get the molarity like this: M = 2(0.227 M) + 2(0.078 M) 
        M = 0.61 M 
After that to get the atm we do it like this:
Π = (0.61 M)(0.08206 atm-L/mol-K)(25 + 273 K) 
Π = 14.9 atm  
and then we do this multyplication
(14.9 atm)(101.3 kPa/atm) = 1509.37 kPa

Given the equation representing a reaction at equilibrium: N2(g) + 3H2(g) 2NH3(g) What occurs when the concentration of H2(g) is increased?

Answers

Given the equation representing a reaction at equilibrium: N2(g) + 3H2(g) = 2NH3(g). When the concentration of the hydrogen gas is increased, the equilibrium will tend to go to the products or to the forward reaction. Therefore, more products are formed.

The diagram below shows the sequence of events and processes which resulted in the origin of life on Earth.Picture shows a flow chart with a rectangle labeled non-living matter at the top, an oval labeled chemical processes below it, and a rectangle labeled A at the bottom.

Which of these events best fits the box labeled A?

A.destruction of cells
B.appearance of bacteria
C.creation of primitive plants
D.transformation of atmosphere

Answers

The rectangle A at the bottom will represent the appearance of bacteria as shown in the attached figure below. Therefore, option (B) is correct.

What is the origin of life on earth?

In biology, the origin of life can be described as the natural process by which life has arisen from non-living matter. The prevailing scientific hypothesis can be described as that the transition from non-living matter to living entities was not a single event.

An evolutionary process that can be involved in the formation of a habitable planet, is the prebiotic synthesis of organic molecules, molecular self-replication autocatalysis, and the emergence of cell membranes.

The study of abiogenesis or the origin of life objectives to determine how pre-life reactions gave origin to live under conditions different from those on Earth today. It uses tools from the fields of biology and chemistry, with recent approaches attempting a synthesis of many sciences.

Therefore, the flow charge will be like living matter → Chemical processes  → the appearance of bacteria.

Learn more about the origin of life, here:

brainly.com/question/17626913

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The diagram below shows the sequence of events and processes which resulted in the origin of life on Earth.Picture shows a flow chart with a rectangle labeled non-living matter at the top, an oval labeled chemical processes below it, and a rectangle labeled A at the bottom.

The event that best fits the box labeled A is appearance of bacteria. The answer is letter B
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